Soviet coin 20 kopecks 1961-1991 coin value

The image of this coin is simply an example of Soviet coin 20 kopecks 1961-1991 type coinage.
Cost approximate and valid for common coin only (without rare varieties).
I do not buy or sell coins - this is just a catalog.

Union of Soviet Socialist Republics - USSR (1922-1991)

Monetary system - Ruble = 100 kopecks
Type - regular coinage

Copper-Nickel-Zinc
Diameter - 21.8 mm.
Weight - 3.3 gram

Years of minting
1961, 1962, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991

Reverse:
Denomination in a wreath of ears
Legend: 20 КОПЕЕК (KOPEKS) year

Obverse:
State emblem of the USSR
Legend: СССР (USSR)

Edge: Reeded

Krause catalog number - Y#132

Value of the coin in the condition "UNC"
1961, 1962, 1977, 1978, 1979, 1980, 1981, 1982, 1983,1984, 1985, 1986, 1987, 1989, 1990, 1991 - <$1
1965, 1966, 1969, 1976 - 70-80 USD
1967, 1968, 1974, 1975 - 30-35 USD
1970, 1971, 1972, 1973 - 100-120 USD